import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text("Stack配置说明"),
      ),
      body: Stack(
        fit: StackFit.expand,
        textDirection: TextDirection.ltr,
        children: <Widget>[
          Text("你好呀" * 10),
          Positioned(
              top: 100,
              left: 100,
              child: Text(
                "一起学吧" * 1,
                style: TextStyle(fontSize: 30),
              )),
          Positioned(
            top: 200,
            child: Text("燥起来吧" * 10)
          )
        ],
      ),
    ),
  ));
}
